Top 5 open source project management tools in 2015

Last year, I covered five of the best open source project management tools,
like ProjectLibre and OpenProject. The article struck a chord with
readers and continues to prove valuable. So, this year I revisited the
tools mentioned in last year's article, taking into account comments and
suggestions from readers, and provided an update on where they are
today. First, I share five new open source project management tools for
2015. All in all, this article will give you a good look at 11 of the
top open source project management tools out there.